Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754768AbbETP1o (ORCPT ); Wed, 20 May 2015 11:27:44 -0400 Received: from smtp10.mail.ru ([94.100.181.92]:45840 "EHLO smtp10.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754071AbbETP1j (ORCPT ); Wed, 20 May 2015 11:27:39 -0400 Message-ID: <555CA7E6.4080300@list.ru> Date: Wed, 20 May 2015 18:27:34 +0300 From: Stas Sergeev User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.6.0 MIME-Version: 1.0 To: linux-leds@vger.kernel.org CC: Linux kernel , Stas Sergeev , Bryan Wu , Richard Purdie , Jacek Anaszewski Subject: [PATCH 09/20] leds: mark gpio driver with LED_BRIGHTNESS_FAST flag References: <555CA58A.10700@list.ru> In-Reply-To: <555CA58A.10700@list.ru> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-Spam: Not detected X-Mras: Ok Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1336 Lines: 37 This driver doesn't use sleeping operations in .brightness_set method if can_sleep variable is not set. In that case it can be marked with LED_BRIGHTNESS_FAST flag. That flag allows changing brightness at high rates (over 100Hz). CC: Bryan Wu CC: Richard Purdie CC: Jacek Anaszewski CC: linux-leds@vger.kernel.org CC: linux-kernel@vger.kernel.org Signed-off-by: Stas Sergeev --- drivers/leds/leds-gpio.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/drivers/leds/leds-gpio.c b/drivers/leds/leds-gpio.c index 3af4f2b..0e1346c 100644 --- a/drivers/leds/leds-gpio.c +++ b/drivers/leds/leds-gpio.c @@ -138,6 +138,8 @@ static int create_gpio_led(const struct gpio_led *template, led_dat->cdev.brightness = state ? LED_FULL : LED_OFF; if (!template->retain_state_suspended) led_dat->cdev.flags |= LED_CORE_SUSPENDRESUME; + if (!led_dat->can_sleep) + led_dat->cdev.flags |= LED_BRIGHTNESS_FAST; ret = gpiod_direction_output(led_dat->gpiod, state); if (ret < 0) -- 1.7.9.5 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/